disadvantage vs head start

disadvantage

noun
  • A weakness or undesirable characteristic; a con. 

  • A setback or handicap. 

  • Loss; detriment; hindrance. 

verb
  • To place at a disadvantage. 

head start

noun
  • A factor conducive to superiority and success. 

  • An advantage consisting in starting a competition or task earlier than might be expected; given (or taken), for example, prior to the beginning of a race. 

How often have the words disadvantage and head start occurred in a corpus of books? (source: Google Ngram Viewer )